Improvement in crevice-searchers and cleaners for oil-wells



WILLIAM FORKER. Improvement in Crevice-Searchersand Cleaners for OiiWeHs.

N0. 115,047. I Patented May 23,1871.

. UNITED STATES PATENT 'GF IoE.

IMPROVEMENT IN CREVlCE-SEARCHERS AND CLEANERS FOR 0|L-WELLS.

Specification forming part of Letters Patent No. 115,047, dated May 23, 1871.

' to the accompanying drawing and to the letters of reference marked thereon.

The nature of my invention consists in the combination and arrangement of the several parts hereinafter described, for the purpose of forming a crevice-searcher and cleaner for oil-wells.

To enable others skilled in the arts to make.

and use my invention, I will proceed to describe more fully its construction and operation.

In the accompanying drawing, which forms part of my specification, Figure 1 is a side ele- -vation of my improvement in crevice-searcher and cleaner for oil-wells. Fig. 2 is a transverse section of the same.at line y of Fig. 1. Fig. 3 is a side elevation of the shaft to which the searchers or cleaners are attached. Figs. 4 and 5 represent the interior of the casing or sheath for the searchers or cleaners. Fig. 6 is a vertical section of the cap-piece for the upper end of the casing or sheath. Fig. 7 is a vertical section of the bottom piece for the lower end of the casing or sheath.

In the accompanying drawing,A represents the cap-piece for the casing, which consists of the two parts 0 and D, provided with bearings f and g for the shaft h. The ends of the parts 0 and D are provided with screwthreads, which are fitted t0 screw-threads in the cap A and bottom piece B. The cap A is provid ed with screw-threads X for the purpose of attaching it to the tubing of the well, and the bottom piece B is provided with a square opening, X, which in size and form corresponds to the size and form of the square J on the lower end of the shaft h. The shaft h is provided with screw-threads i, which are used for connecting the shaft h to the pump-rod of the wells, and is also provided with a flange or collar, m, on which rests the lower end of a spiral spring, k, which is placed around the shaft immediately above the flange or collar m Tothe shaft h is attached a number of flexible searchers or cleaners, l, which should be constructed of strips of spring-steel.

In placing the several parts in juxtaposition the shaft his placed in the part 0 or D of the casing, with the crevice-searchers or cleaners lplaced in the recess 6, and the upper end of the spring 70 resting against the under side of the bearing f. The other part of the casin g is then placed over the shaft, and the cap A and bottom piece B are screwed on the casing. The shaft h is then drawn up so that the square part J of the shaft is drawn out of the opening X of the bottom piece B. The shaft is then rotated until the crevicesearchers or cleaners are drawn into the casing or sheath. At this point the draft on the shaft is released and the spring is will force the shaft down; the square portion J will enter the opening X in the bottom pieceB,thereby holding the shaft so that it will retain the crevice-searchers or cleaners 1 within the casing or sheath. The apparatus is then ready to be used for the purpose of searching and cleaning out the crevices in the well at the point or depth desired.

The apparatus hereinbefore described is used in the following manner: The tubing is removed from the well, and to the lower end of it is attached the cap A, through the medium of the screw X, and screw-threads on the inside and at the lower end of the tubing. After securing the apparatus to the tubing it is lowered into the well; the pumping-rod is then lowered in the tubing, and, by rotating it, is attached to the shaft It through the medium of the screw-threads a and screw-threads in the end of the pump-rod. After the pumprod is properly attached to the shaft h it is drawn up so that the part J shall be drawn out of the opening X of the bottom piece B. The pump-rod is again rotated so as to force out the searchers Z; the pump-rod is then released from the upward draft on it, which will allow the spring is to force it and the shaft h down, so that the square part 'J will enter the opening X of the bottom piece B, and thereby hold the shaft h in a fixed position. The tubing in the well is then rotated, which will rotate the apparatus attached to it, and the rotating of the apparatus will cause the flexible searcher to scrape off the parafline from the sides of the well and clean out the crevices through which the oil flows into the well After rotating the tubing and the apparzv tus attached to it until the operator thinks the paraffine and other obstructing matter are cleaned off from the sides of the well and out of the crevices, the searchers l are then wound into their casing or sheath, as hereinbefore described, and the tubing and apparatus withdrawn from the well, and the paraffine and other matter which have been scraped off from the sides and out of the crevices are removed from the well by the use of the ordinary sandpump, the use and operation of which are well understood by operators of oil-wells.

I combined, and operating substantially as hereinbefore described, andfor the purpose set forth.

VILLTAM FORKER.

Witnesses:

JAMES J. JOHNSTON, GEORGE H. Tnoams. 

